Clean up trailing whitespace in the kernel headers.

And fix the scripts so they stop letting trailing whitespace through.

Change-Id: Ie109fbe1f63321e565ba0fa60fee8e9cf3a61cfc
diff --git a/libc/kernel/common/linux/pagemap.h b/libc/kernel/common/linux/pagemap.h
index 2a5223a..c91e78b 100644
--- a/libc/kernel/common/linux/pagemap.h
+++ b/libc/kernel/common/linux/pagemap.h
@@ -27,8 +27,8 @@
 #include <asm/uaccess.h>
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #include <linux/gfp.h>
-#define AS_EIO (__GFP_BITS_SHIFT + 0)  
-#define AS_ENOSPC (__GFP_BITS_SHIFT + 1)  
+#define AS_EIO (__GFP_BITS_SHIFT + 0)
+#define AS_ENOSPC (__GFP_BITS_SHIFT + 1)
 #define PAGE_CACHE_SHIFT PAGE_SHIFT
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define PAGE_CACHE_SIZE PAGE_SIZE